Vacuum cleaner



FIG. 1 is a top and front perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a bottom and rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The details shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 